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    Home MCQ examination Jamb Biology 2011

    Biology 2011 Jamb Examination

    Biology 2011 Jamb Examination
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    Question 31

    The fallacy in Lamarck's evolutionary theory was the assumption that
    Show explanation Expand Question
    Lamarck's major error was assuming that acquired traits (developed during an organism's lifetime) could be passed to offspring. Modern genetics has shown this is false; only heritable genetic changes are passed.
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    Question 32

    The bright coloured eye spots on the wings of moth are an example of
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    Eye spots serve to scare or distract predators, which is a type of warning coloration (aposematism), signaling potential danger or unpalatability.
    Not clear enough?

    Question 33

    The wings of a bat and those of a bird are examples of
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    Bat and bird wings evolved independently for flight but have similar functions; their analogous structures illustrate convergent evolution, not divergence from a common winged ancestor.
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    Question 34

    Use the diagram above to answer this question. Which of the organisms represented are notable agricultural pests?
    Use the diagram above to answer this question. Which of the organisms represented are notable agricultural pests?
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    From the diagram, organisms II and IV are recognized as common agricultural pests due to their feeding habits which damage crops.
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    Question 35

    Use the diagram above to answer this question. The gas evolved in the process is
    Use the diagram above to answer this question. The gas evolved in the process is
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    The process shown in the diagram is photosynthesis, where plants convert CO₂ and water into glucose and release oxygen as a byproduct.
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    Question 36

    Use the diagram above to answer this question. The experimental set-up above is used to demonstrate the process of
    Use the diagram above to answer this question. The experimental set-up above is used to demonstrate the process of
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    This experiment with two test tubes one containing lime water and the other containing 10% sucrose with yeast is used to demonstrate the process of fermentation.

    • In the sucrose + yeast tube, yeast ferments the sugar to produce ethanol and carbon dioxide (CO₂).

    • The CO₂ released can be bubbled through lime water (Ca(OH)₂), which turns milky, indicating the formation of CaCO₃.

    • This confirms that fermentation produces carbon dioxide.

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    Question 37

    An economic importance of the organism represented by IV is that
    An economic importance of the organism represented by IV is that
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    From the diagram, organism IV is a common pest that damages crops, making it economically important as a harmful organism in agriculture.
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    Question 38

    The adult form of iii is a vector of
    The adult form of iii is a vector of
    Show explanation Expand Question

    The organism shown in III represents the mosquito during its pupal stage. When it matures into an adult, it serves as the vector for elephantiasis.

    Elephantiasis, or lymphatic filariasis, is a disease caused by parasitic worms transmitted through the bite of infected mosquitoes. The infection affects the lymphatic system, often resulting in significant swelling of the limbs and other serious health complications.

    Not clear enough?

    Question 39

    Which of the following groups of environmental factors are density-dependent?
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    Density-dependent factors are those whose effects on population size increase as population density increases. Food availability, predation, disease, and accumulation of metabolites are classic examples.
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    Question 40

    Millet, sorghum, maize and onions are common crops grown in Nigeria in the
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    These crops are adapted to the semi-arid conditions of the Sudan Savanna of Nigeria, which has moderate rainfall suitable for their cultivation.
    Not clear enough?
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